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MBP can't boot (no chime, no display)

Hello Everyone,

Since three days, my Macbook pro is refusing to boot : I can see the front LED, ear the Superdrive start, ventilators and HD are started too; Then 10 seconds after, it reboots and does the same.

Display stays black, no chime too.

I replaced the two RAM sticks, tried SMC reset and PRAM reset (as I'm not even getting a grey screen, I think I tried that for nothing). I also replaced the Hard drive and disconnected the Superdrive.

Nothing! It keeps rebooting again and again...

Does someone have already seen that?

Thanks

Alex

Answer this question I have this problem too

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What are you using to power the mac when this happens? This sounds like a power issue to me. Try removing the battery and powering off an AC adapter only. Make sure you are using an 85 Watt AC Adapter and not a 65W or less.

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Tried with two different 85W adapter. Still same issue.

Thanks for your help !

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Try booting into Safe Mose by booting with the shift key held down.

Next try

+ booting from another LEOPARD device and applying the latest system update.

+ repairing permissions via disk utility

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Safe mode is unreachable because i'm not even getting a grey screen.

Also tried to boot from my Leopard Install CD and that's not better.

Thanks for your help

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Try an

external display if that fails too you most likely have a damaged GPU or logic board.

If this answer was helpful please remember to mark it accepted.

Good Luck,

N

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external display when it won't boot? why

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I don't think it can help too.

I'll try tomorrow, if I can find one. If someone else have an idea...

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Display stays black, no chime

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Tried. Not better. Thank you

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